function arrSum(arr) {
    return arr.reduce((sum, e) => sum + parseInt(e), 0);
}
function Main(input) {
    let src = input.split("\n");
    let N = parseInt(src[0]);
    let a = src[1].split(" ");
    let ans = 0;
    let sum = arrSum(a);
    for (let i = 0; i <= 100; i++)
        if (!((sum + i) % N)) ans++;
    console.log(ans);
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));